Intussusception is the invagination of one portion of the intestine into the contiguous distal segment. During infancy and childhood it is the most common cause of acquired intestinal obstruction. This is a clinical and radioligcla study if 120 cases who visited our Chonnam National University Hospital frim January 1975 to August 1979. The results were summarized as follows : 1. Age, Sex and Seasonal Incidence. In 120 cases, 88.3% of the patients were under the one year of age and peak incidence occurred from 4 to 12 month of age. In sex distribution, male showed definitely higher incidence than infemale patients with the ratio of 2.2:1 . Although the disease occurs the year around, spring and summer showed somewhat higher incidences. 2. The common symptoms and signs were vomiting (88.8%), bloody stool (81.7%), palpable mass (66.75), and irritability(29.2%) in order of the frequency. 3. The common x-ray findings of plain abdomen were moderate dilatation of gas filled bowels lo p (62.8%), obliteration of the gas shadow in the cecum and ascending colon(505), and soft tissue mass density. 4. The most obstructing point found by barium enema was at the hepatic flexure. 5. The over-all reduction rate by hydrostatic barium reduction was 69.4%, and this rate was increased in the following cases : 1) the duration of symptoms under the 12 hours(89.2%) and between 13 to 24 hours(705). 2) no evidence of severe small bowel obstruction. 3) in the cases of ileocecal , ileocolic or colocolic of the type of intussusception. 6. Recurrence rate was 4.2%. 7. Mortaility rate in 120 cases of intussusception was 2.5%.